金川二矿某巷道围岩力学参数对变形的敏感性分析
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摘要
为了给金川镍矿采场及巷道稳定性分析的参数选取提供可借鉴的依据,利用非线性弹塑性有限元法,对位于金川二矿区底盘某采准巷道围岩力学参数(变形模量、泊松比、粘聚力和内摩擦角)对变形的敏感性进行分析。分析结果表明,这4个参数对变形的敏感度不尽相同,从大到小依次为变形模量、内摩擦角、泊松比、粘聚力,且其变形模量与内摩擦角的敏感度远大于泊松比和粘聚力的敏感度。这一分析结果对今后金川镍矿的稳定性分析具有一定的参考价值,尤其要求对变形模量与内摩擦角的选取一定要谨慎。
In order to provide bases for parameters selection of stability analysis in Jinchuan nickel mine,which is one of the largest bases of metal resources,nonlinear elastoplastic finite element method is used for the sensitivity analysis of four mechanical parameters to the deformation of surrounding rocks of a tunnel in Jinchuan deposit Ⅱ. The analytical results show that the sensitivities of these parameters to deformation are different and the sequences of sensitivity,in a decreasing order,are the deformation modulus,the friction angle,the Poisson’s ratio,and the cohesion force. Especially,the sensitivities of deformation modulus and friction angle are comparatively higher than those of the two other parameters. Based on this result,more attentions should be paid to the deformation modulus and the friction angle in similar studies and analysis in Jinchuan deposit Ⅱ.
In order to provide bases for parameters selection of stability analysis in Jinchuan nickel mine,which is one of the largest bases of metal resources,nonlinear elastoplastic finite element method is used for the sensitivity analysis of four mechanical parameters to the deformation of surrounding rocks of a tunnel in Jinchuan deposit Ⅱ. The analytical results show that the sensitivities of these parameters to deformation are different and the sequences of sensitivity,in a decreasing order,are the deformation modulus,the friction angle,the Poisson’s ratio,and the cohesion force. Especially,the sensitivities of deformation modulus and friction angle are comparatively higher than those of the two other parameters. Based on this result,more attentions should be paid to the deformation modulus and the friction angle in similar studies and analysis in Jinchuan deposit Ⅱ.
引文
[1]金川有色金属公司,中国岩石力学与工程学会金川分会.金川镍矿开采的工程地质与岩石力学问题(上、下)[R].金昌:金川有色金属公司,中国岩石力学与工程学会金川分会,1996.(Jinchuan Non-FerrousMetalsCorp.ChineseSociety forRockMechanics andEngineering.Problems of engineering geology and rock mechanics in mining ofJinchuan nickel mine[R].Jinchang:JinchuanNon-FerrousMetalsCorp.,JinchuanBranch ofChineseSociety forRockMechanics andEngineering,1996.(inChinese))
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[2]高谦,王少泉,赵千里等.金川二矿区不良岩层采场巷道片帮冒顶事故的分析[J].工业安全与防尘,2001,27(1):35–38.(GaoQian,WangShaoquan,ZhaoQianli,et al.Fault tree analysis for collapse of roadways with fractured surrounding rock and high tectonic stress inJinchuan mineNo.2[J].IndustrialSafty andDustControl,2001,27(1):35–38.(inChinese))
[3]杨志法,王思敬,冯紫良等.岩土工程反分析原理及应用[M].北京:地震出版社,2002.(YangZhifa,WangSijing,FengZiliang, et al.Principle andItsApplication ofBack-analysis inGeomechanics[M].Beijing:EarthquakePress,2002.(inChinese))
[4]章光,朱维申.参数敏感性分析与试验方案优化[J].岩土力学,1993,14(1):51–58.(ZhangGuang,ZhuWeishen.Susceptibility analyses of parameters and optimization of test program[J].Rock andSoilMechanics,1993,14(1):51–58.(inChinese))
[5]雷兴刚,周小平.岩土介质强度参数相关性的敏感度分析[J].云南农业大学学报,1999,14(2):171–175.(LeiXinggang,ZhouXiaoping.Analyses of susceptibility in the strength of parameters interrelationship of rock and soil media[J].Journal ofYunnanAgriculturalUniversity,1999,14(2):171–175.(inChinese))
[6]严春风,刘东燕,张建辉等.岩土工程可靠度关于强度参数分布函数概型的敏感度分析[J].岩石力学与工程学报,1999,18(1):36– 39.(YanChunfeng,LiuDongyan,ZhangJianhui, et al.The susceptibility analysis of reliability for the probability distribution types of parameters in strength criterion[J].ChineseJournal ofRockMechanics andEngineering,1999,18(1):36–39.(inChinese))
[7]朱维申,章光.节理岩体参数对围岩破损区影响的敏感性分析[J].地下空间,1994,14(1):10–15.(ZhuWeishen,ZhangGuang.Susceptibility analyses of parameters of jointed rock to breaking area in surrounding rock[J].UndergroundSpace,1994,14(1):10–15.(inChinese))
[8]朱国祥.土层地震反应分析中不同参数的敏感性分析[J].工程抗震,2004,100(3):27–32.(ZhuGuoxiang.Sensitivity of different parameters applied in seismic analysis of multi-layer soil models[J].EarthquakeResistantEngineering,2004,100(3):27–32.(inChinese))
[9]杨林德,冯紫良,朱合华等.岩土工程问题的反演理论与工程实践[M].北京:科学出版社,1996.(YangLinde,FengZiliang,ZhuHehua,et al.InversionTheory andItsEngineeringPractice inGeomechnics[M].Beijing:SciencePress,1996.(inChinese))
[10]侯哲生.金川二矿区巷道围岩岩体力学参数分析[硕士学位论文][D].兰州:兰州大学,2001.(HouZhesheng.Analysis on rockmass mechanical parameters of surrounding rocks of tunnels inJinchuanDepositⅡ[M.S.Thesis][D].Lanzhou:LanzhouUniversity,2001.(inChinese))
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